Deploying Prometheus
Our Prometheus deployment will be done using a Helm chart that installs kube-prometheus, which installs and builds upon the Prometheus Operator by providing a convenient set of defaults. We’ll begin by briefly going over what you’re going to be deploying so that you understand it instead of blindly applying it because someone in a book told you to.
Prometheus Operator overview
The Prometheus Operator is a project that was originally started by Prometheus maintainer Frederic Branczyk to make it simpler to deploy and manage multiple Prometheus instances in a Kubernetes cluster. Consequently, it abstracts away some pieces of Prometheus behind various Kubernetes Custom Resource Definitions (CRDs).
The main CRDs to be aware of with the Prometheus Operator are Prometheus, ServiceMonitor, PrometheusRule, and Alertmanager.
Prometheus and Alertmanager are straightforward, but PrometheusRule and ServiceMonitor are key abstractions. PrometheusRule...
